Homer p



Oct. 6l 1925.

H, P. CHANDLER DRILLING HIEUKARISH Filed Aug. 12. 1522 CWZJ.

Patented Oct. 6, 1925.

UNITED STATES.

PATENT] OFFICE.

HOMER P. CHANDLER., 0F MANSFIELD, OHIO, ASSIGNOR T0 THE OHIO BRASS COM-PANY, OF MANSFIELD, OHIO, ACORPORATION OF NEW JERSEY.

DRILLING MECHANISM.

Application led August `12, 1922. Serial No. 581,318.

To all whom t may concern:

Be it known that I, HoMnn P. CHANDLER, a citizen of the United States ofAmerica, residing at Mansfield, in the county of Richland and State ofOhio, have invented certain new and useful Improvements in DrillingMechanisms, of which the following is a. specification. i

My invention relates to a drilling mechanism and particularly that classof drill which is portable and finds general `use around a mine lorquarry. y

One object of my invention is to produce a drill of simple, eflicientand economical construction having a feeding mechanism for driving thedrill forward or backward and by whichthe rate of feed may be varied atwill by wide limits while the speed of the drill may remain constant. yl

My invention resides in the combination of a peculiar and novelconstruction and relation of the various parts more fully described inthis specication as set forth in theaccompanying drawings.

In the drawing accompanying this specification:

Figure 1 shows an exterior side view of my device. y

Fig. 2 shows an enlargement of the operating mechanism shown on Fig. 1.

Fig. 3 shows a facel view ofthe feed nut 'and shows the same open as isthe case when vit is desired to place the nut upon the feed shaft or toremove it from the feed shaft.

Fig'. 1 shows an end view of F ig. 3.

'1n my preferred construction l employ a hollow member 1 closed at thelower end and pointed as indicated by the numeral 2. At the lower end ofthe member 1 is a bracket 3 having 'a pointed end 4 and the fasteningdevices securing the bracket to the hollow member 1. The m bers 2 and lare intended eng e floor or wall of the `ce which is to be r reir beingpointed i n the surthe member l and passing axiaily .through the casing6 is a feed member 8,

ymits the feed member 8 to move'up or down relatively to the beveledgearr 11, and to be withdrawn without disturbing the other .parts butcompels the gear and feed member to rotate in unison. i. y

l Projecting from the casing 6 is a stud 13 upon which is mounted ,ahandle gear 14 for operating the drilling mechanism. The handle 14 isprovided with teeth 15 which engage the teeth 16 on the beveled gear 11.A

washer 17 and nut 18, the latter secured to Athe stud 13, maintain thehandle gear in posit-ion. The rotation of themember 14C will cause themember 6 to rotate and the mem ber 6 in turn will cause the member'S torotate on account of the key 12 which yrotates with the member 11 andengages with the slot 10 of the member 8.

" Secured to the casing 6 isa cover member 19 provided with an aperturethrough which the member 8 passes and secured to the casing 6 by meansof a plurality of fastening members 20. hlounted upon the cover 19 infree relationthereto, but in threaded engagement with the feed member 8,is a feed nut 21 bymeans of 'whichfthe member 8 is caused to advance orretract when rotated. T ie feed nut 21 is composed of two members 2Q andQ3 and hinge lugs 2- and 25 a pin t 26 passing thrbugh an hinge lug'for' hol together, but

aperture in each nen ibers 22 and 23 LL T Liter can veryr easily er S byopen- [2 r icS O1 uson the 53. The li pr f ed with an at one end uponwhich Q f 1606i thread mounted G1 nur) Lr. @La

threaded engagement the hand wheel 28. This hand wheel serves thepurpose of securing the parts 22 and 28 together and also as a means ofpreventing the rotation of the feed nut 21 as the feed member 8 rotates,and also as a means of rotating the feed nut in one direction, namely,opposite to that in which the member 8 rotates in the operation ofdrilling. This rotation of the feed nut 21 is possible on accountof itsdet-ached relation to the cover 19.

To the upper end of the feed member 8 is a chuck 29 provided with an endrecess 30 to receive a drill bit 31. Below the chuck 29 is a large sizedwasher 32 which tends to prevent the line particles of dirt, etc., fromfalling directly upon the operating mechanism, The hand wheel 28 isprevented from rotating by means of the set screw 33.

The operation of my device is as follows:

Assuming the drill is in position for operation an operator stands infront of the handle 14, if he will rotate the handle 14 in a clockwisedirection, this will cause the beveled gear to rotate and the feedmember 8 in unison in a counterclockwise direction when looking downwardupon the member 8. If the feed nut 21 is not held by the hand of theoperator it will rotate in unison with the member 8 and in the Isamedirection, for the reason that the friction between the member 21 andthe member 8 is so arranged as to be greater than the friction betweenthe member 21 and the member 19. If the member 21 rotates at the samespeed as the member 8 and in the same direction the member 8 will notmove in or out of the casing 1.

If the member 28, however, is grasped by the hand of the operator whilehe still rotates the handle 14 in a clockwise direction, the member 21being held stationary and the member 8 rotating relative thereto, themember 8 will be caused to advance or move outwardly from the casing 1,the rate of advance relative to the rate of rotation of the member 8being determined by the pitch of the thread on the members 8 and 21. If,however, the operator should rotate the member 21 in a counter-clockwisedirection (when looking down upon the member 28) and at the same timerotate the member 14 in a clockwise direction the rate of feed of themember 8 or the rate at' which it will advance will be increased overthat described in the last paragraph.

Likewise, if the rotation of the member 21, on account of its frictionwith the rotating member 8, is retarded by means of allowing the handwheel 28 to slide through the hand of the operator while the member 14is still rotated as already described, the rate of advance or feed ofthe member 8 will be less than if the member 21 were held stationary andwill be somewhat greater than if the member 21 were allowed to rotatewith the member 8 and at the speed of the member 8.

It will be seen from this construction that the feeding mechanism has awide range of feed control from the Zero rate, in either direction,depending upon the rate at and the direction in which the feed nut 21 isrotated relative to the feed member 8 as already described.

The operator can also produce a negative rate of speed, that is, tocause the member 8 to be withdrawn within the member 1 while the handle14 is being rotated if he but rotates the hand wheel 28 at a suficientrate in a countercloclrwise direction (when looking downward upon thehand wheel). This is true when he is able to rotate the hand wheel 28 ina counterclockwise direction at a rate of speed greater than that of themember 8.

t will be quite apparent that there are many modifications which may beiliade in the construction as disclosed anddescribed herein withoutdeparting from my invention, and that the mechanism is suitable formotor operation, as well as hand operation. This wide variation in therate of-feed will be found particularly advantageous around a mine wherematerial is to be drilled of various degrees of hardness.

T claim:

1. A drilling mechanism having in combination a support, a feed memberarranged to operate a drill bit, mechanism for rotating the feed member,a feed nut mounted upon the feed member and having a threaded engagementtherewith and rotatable relative thereto and having free longitudinalmovement in one direction. I

2. A drilling mechanism having in combination a support, a feed memberarranged to operate a drill bit, mechanism for rotating the feed member,means threadably mounted upon the feed member and rotatable therewithand movable longitudinally therewith in one direction to advance orretract the feed member at will without changing the direction ofrotation of the feed member.

3. A drilling mechanism comprising in combination a support, a feedmechanism provided with an external thread and arranged to operate adrill bit, operating mechanism for rotating the feed mechanism, means onthe operating mechanism engaging with means on the feed member to causethe two to rotate in unison, but permit the said means to simultaneouslyslide forward and back relative to each other, a quick detachable feednut. comprising two parts forming a collar and having an internal threadto engage with the thread on the feed mechanism and rotatable about theaXi's of the feed mechanism and movable in one longitudinal directiontogether with the feed llO mechanism and a member mounted on the feednut to hold the parts together on the feed mechanism and to control ytherotation of the feed nut relative to the feed mechanism, the said collaroperating to move the feed member forward when it rotates in thedirection of rotationl as the feed member but at a less speed and toprevent the feed member moving forward when the collar rotates in thesame direction and at the same speed as the feed member and to move thefeed member back when the collar rotates in the opposite direction tothatof the feed bar.

4f. A drilling mechanism having in combination a support, a feed memberarranged to operate a drill bit, mechanism for operating the feedmechanism, a quick attachable and detachable split feed nut having meansto hinge its parts together mounted on the feed mechanism and movablerelative to the support in one longitudinal direction, means to hold theparts of the feed nut together and control the rotationfof the feed nutrelative to the feed mechanism for varying the rate of longitudinalmovement of the feed member when drilling.

5. A drilling mechanism comprising in combination a tubular support, anelongated feed member provided with a longitudinally disposed slot andan external thread substantially the entire length and mounted to beadvanced or retracted within the tubular support, a gear provided with akey engaging the slot in the feed member, manually operated meansengaging with the gear to rotate the gear, means on the feed member toreceive a drill bit, a feed nut for moving the feed member forward orback when the feed member is rotated, the feed nut comprising a two parthinged collar threaded internally and engaging the thread on the feedmember and free to be rotated by the feed member in the same directionor to be rotated manually in either direction about the axis of the feedmember to vary the forward or baclr movement of the feed memberl andmeans to hold the parts of the feed nut in position upon the feed memberand means on the end of the tubulary member to engage a support oppositethe point where the drill is to operate such that the point of the drillbit and point of support of the drilling mechanism will be atsubstantially opposite ends of the longitudinal axis of the tubular andthe feed member.

6. A drilling mechanism comprising in combination a tubular support, anelongated. feed member provided with a longitudinally disposed slot andan external thread substantially the entire length positioned intelescopic relation to the support, a gear provided with a key engagingthe slot in the feed member, manually operated means engaging with thegear to rotate the gear, means on the feed member to receive a drillbit, a feed nut for moving the feed member forward or back within thetubular support when the feed member is rotated, the feed nut comprisinga two part `collar threaded internally to engage the thread on the feedmember and free to rotate about the axis of the feed member and means tohold the parts of the feed nut in position upon the feed member andmeans slidably mounted on the tubular support to engage a solid supportto brace the drilling mechanism and to prevent the rotation of themechanism while drilling.

7. A drilling mechanism comprising in combination a tubular support, anelongated feed member provided with an external thread substantially itsentire length andpositioned in telescopic relation to they support,operating mechanismfor rotating the feed member, means on the operating'mechanism engaging with means on the feed mechanism to cause the two torotate in unison but permit the feed member to simultaneously moveforward and back relative to the operating mechanism, a collar f havinga threaded engagement with the thread on the feed member to effect thefor relative rotation of the feed member and collar and means to rotatethe collar inV one direction to retard the forward movement of the feedmember and to rotate the vcollar in the opposite direction to assist theforward movement of the feed member.

8. A drilling mechanism comprising in combination a support and athreaded feed member having a common axis, the feed member having adrill to engage the body to be drilled and means on the support toengage an oppositely disposed body to act as a brace, threaded meansrotatably mounted on the feed member and movable longitudinally of thesupport away from the support and adapted to control the longitudinalmovement of the feed member relative to the support and means mounted onthe support to operate the feed member.

9. A drilling mechanism comprising in combination two telescopic membershaving a `common axis, on one member to engage a fixed support and meanson the other member to receive a drill, the two means beingsubstantially at opposite ends of the said axis, and means to rotate thesaid member relative to each other and means to move the memberslongitudinally of each other at varying'speeds as desired by operator.

ln testimony whereof l ture.

my signa- HOMLR P. CHANDLER.

